Blanka stålprodukter Tekniska leveransbestämmelser Del 1: Allmänt. Bright steel products Technical delivery conditions Part 1: General

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1 SVENSK STANDARD SS-EN :2008 Fastställd/Approved: Publicerad/Published: Utgåva/Edition: 2 Språk/Language: engelska/english ICS: Blanka stålprodukter Tekniska leveransbestämmelser Del 1: Allmänt Bright steel products Technical delivery conditions Part 1: General SWEDISH STANDARDS INSTITUTE

2 Hitta rätt produkt och ett leveranssätt som passar dig Standarder Genom att följa gällande standard både effektiviserar och säkrar du ditt arbete. Många standarder ingår dessutom ofta i paket. Tjänster Abonnemang är tjänsten där vi uppdaterar dig med aktuella standarder när förändringar sker på dem du valt att abonnera på. På så sätt är du säker på att du alltid arbetar efter rätt utgåva. e-nav är vår online-tjänst som ger dig och dina kollegor tillgång till standarder ni valt att abonnera på dygnet runt. Med e-nav kan samma standard användas av flera personer samtidigt. Leveranssätt Du väljer hur du vill ha dina standarder levererade. Vi kan erbjuda dig dem på papper och som pdf. Andra produkter Vi har böcker som underlättar arbetet att följa en standard. Med våra böcker får du ökad förståelse för hur standarder ska följas och vilka fördelar den ger dig i ditt arbete. Vi tar fram många egna publikationer och fungerar även som återförsäljare. Det gör att du hos oss kan hitta över 500 unika titlar. Vi har även tekniska rapporter, specifikationer och workshop agreement. Matriser är en översikt på standarder och handböcker som bör läsas tillsammans. De finns på sis.se och ger dig en bra bild över hur olika produkter hör ihop. Standardiseringsprojekt Du kan påverka innehållet i framtida standarder genom att delta i någon av SIS ca 400 Tekniska Kommittéer. Find the right product and the type of delivery that suits you Standards By complying with current standards, you can make your work more efficient and ensure reliability. Also, several of the standards are often supplied in packages. Services Subscription is the service that keeps you up to date with current standards when changes occur in the ones you have chosen to subscribe to. This ensures that you are always working with the right edition. e-nav is our online service that gives you and your colleagues access to the standards you subscribe to 24 hours a day. With e-nav, the same standards can be used by several people at once. Type of delivery You choose how you want your standards delivered. We can supply them both on paper and as PDF files. Other products We have books that facilitate standards compliance. They make it easier to understand how compliance works and how this benefits you in your operation. We produce many publications of our own, and also act as retailers. This means that we have more than 500 unique titles for you to choose from. We also have technical reports, specifications and workshop agreements. Matrices, listed at sis.se, provide an overview of which publications belong together. Standardisation project You can influence the content of future standards by taking part in one or other of SIS s 400 or so Technical Committees.

3 Europastandarden EN :2008 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN :2008. Denna standard ersätter SS-EN , utgåva 1. The European Standard EN :2008 has the status of a Swedish Standard. This document contains the official English version of EN :2008. This standard supersedes the Swedish Standard SS-EN , edition 1. Copyright/Upphovsrätten till denna produkt tillhör SIS, Swedish Standards Institute, Stockholm, Sverige. Användningen av denna produkt regleras av slutanvändarlicensen som återfinns i denna produkt, se standardens sista sidor. Copyright SIS, Swedish Standards Institute, Stockholm, Sweden. All rights reserved. The use of this product is governed by!the end-user licence for this product. You will find the licence in the end of this document. Upplysningar om sakinnehållet i standarden lämnas av SIS, Swedish Standards Institute, telefon Standarder kan beställas hos SIS Förlag AB som även lämnar allmänna upplysningar om svensk och utländsk standard. Information about the content of the standard is available from the Swedish Standards Institute (SIS), tel Standards may be ordered from SIS Förlag AB, who can also provide general information about Swedish and foreign standards. SIS Förlag AB, SE Stockholm, Sweden. Tel: Fax: sis.sales@sis.se Internet:

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5 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN March 2008 ICS Supersedes EN :1999 English Version Bright steel products - Technical delivery conditions - Part 1: General Produits en acier transformés à froid - Conditions techniques de livraison - Partie 1: Généralités Blankstahlerzeugnisse - Technische Lieferbedingungen - Teil 1: Allgemeines This European Standard was approved by CEN on 4 February CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN :2008: E

6 SS-EN : :2008 (E) (E) Contents Page Foreword Scope Normative references Terms and definitions Classification and designation Classification Designation Information to be supplied by the purchaser Mandatory information Options Manufacturing process Steel making process Manufacture of the product Delivery conditions Requirements Chemical composition Mechanical properties Hardenability Grain size Non-metallic inclusions Decarburization Surface condition Internal soundness Dimensions, shape and tolerances Inspection and testing Types and contents of inspection documents Specific inspection Marking...11 Annex A (normative) Ruling section for mechanical properties...13 Annex B (normative) Options...16 Bibliography

7 SS-EN :2008 (E) Foreword This document (EN :2008) has been prepared by Technical Committee ECISS/TC 23 Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimensions, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN :1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. This European Standard EN 'Bright steel products - Technical delivery conditions' is subdivided as follows: Part 1: General; Part 2: Steels for general engineering purposes; Part 3: Free-cutting steels; Part 4: Case hardening steels; Part 5: Steels for quenching and tempering. During the preparation of the first edition of this European Standard there were not enough statistical data available concerning mechanical properties of bright bar products. Since then it has been recognized that the proof strength values in the cold drawn condition were too high. In addition, cyclic stresses that occur during straightening can reduce the proof strength (Bauschinger's effect), which was not taken into account when drafting the first edition of this standard. In this second edition the proof strength values of non-alloy and alloy grades in condition +QT+C in parts 3 and 5 have been adjusted downwards compared to the first edition. 3

8 SS-EN : :2008 (E) (E) 1 Scope This part of EN specifies the general technical delivery conditions for bright steel bars in the drawn, turned or ground condition, in straight lengths and of the following steel types: a) steels for general engineering purposes as specified in EN ; b) free-cutting steels as specified in EN ; c) case hardening steels as specified in EN ; d) steels for quenching and tempering as specified in EN It does not cover cold rolled products and cut lengths produced from strip or sheet by cutting. In special cases variations in these technical delivery requirements or additions to them may form the subject of an agreement at the time of enquiry and order (see Annex B). In addition to the specifications of this European Standard, the general technical delivery requirements of EN are applicable, unless otherwise specified. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 606, Bar coding - Transport and handling labels for steel products EN , Metallic materials - Tensile testing - Part 1: Method of test at ambient temperature EN 10020:2000, Definition and classification of grades of steel EN 10021, General technical delivery conditions for steel products EN , Designation systems for steels - Part 1: Steel names EN , Designation systems for steels - Part 2: Numerical system EN 10052, Vocabulary of heat treatment terms for ferrous products EN 10079:2007, Definition of steel products EN , Steels for quenching and tempering Part 2: Technical delivery conditions for non alloy steels EN , Steels for quenching and tempering Part 3: Technical delivery conditions for alloy steels EN 10084, Case hardening steels Technical delivery conditions EN 10204, Metallic products - Types of inspection documents prcen/tr 10261, Iron and steel - Review of available methods of chemical analysis EN , Bright steel products - Technical delivery conditions - Part 2: Steels for general engineering purposes 4

9 SS-EN :2008 (E) EN , Bright steel products - Technical delivery conditions - Part 3: Free-cutting steels EN , Bright steel products - Technical delivery conditions - Part 4: Case-hardening steels EN , Bright steel products - Technical delivery conditions - Part 5: Steels for quenching and tempering EN 10278, Dimensions and tolerances of bright steel products EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 643, Steels - Micrographic determination of the apparent grain size (ISO 643:2003) EN ISO 3887, Steels - Determination of depth of decarburization (ISO 3887:2003) EN ISO , Metallic materials - Brinell hardness test - Part 1: Test method (ISO :2005) EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 10021:2006, EN ISO 377:1997, EN ISO 14284:2002 and the following apply. 3.1 non-alloy and alloy steel; quality and special steel see the terms and definitions in EN 10020: steel products steel products are defined according to their shape and dimensions in EN In particular the following definitions are reproduced drawn products ( , EN 10079:2007) products of various cross section shapes obtained, after descaling, by drawing of hot rolled bars or rod on a draw bench (cold deformation without removing material) NOTE This operation gives the product special features with respect to shape, dimensional accuracy and surface finish. In addition, the process causes cold working of the product, which can be eliminated by subsequent heat treatment. Products in lengths are delivered straightened regardless of size turned products ( , EN 10079:2007) round bars produced by turning on a lathe where the product can be further processed by straightening and polishing NOTE 1 This operation gives the bar special features with respect to shape, dimensional accuracy and surface finish. The removal of metal is carried out in such a way that the bright product is generally free from rolling defects and surface decarburization. NOTE 2 For technical reasons some bars ordered as hot rolled products may be delivered roughly turned (peeled), nevertheless such products are treated as hot rolled products and not as bright products. 5

10 SS-EN : :2008 (E) (E) ground products ( , EN 10079:2007) drawn or turned round bars given an improved surface quality and dimensional accuracy by grinding or grinding and polishing 3.3 heat treatment terms terms used in the heat treatment of steel are defined in EN ruling section for heat treatment ruling section for heat treatment of a product is the section for which the mechanical properties have been specified (see Annex A). Whatever the actual shape and dimensions of the cross section of the product, the size of its ruling section is expressed as a diameter. This corresponds to the diameter of an equivalent round bar which, at the position of its cross section specified for taking test pieces for mechanical tests, will, when being cooled from the austenitising temperature, show the same cooling rate as the actual ruling section of the product concerned at its position for taking test pieces NOTE The term ruling section should not be confused with the term equivalent diameter as defined in EN Classification and designation 4.1 Classification The classification of the relevant steel grades according to EN is indicated in EN to EN Designation Steel names For the steel grades covered by this European Standard, the steel names as given in the relevant tables of EN to EN are assigned in accordance with EN Steel numbers For the steel grades covered by this European Standard, the steel numbers as given in the relevant tables of EN to EN are allocated in accordance with EN Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the purchaser at the time of enquiry and order: a) quantity (mass, number of bars) to be delivered; b) shape of the product (e.g. round, hexagon, square, flat); c) number of the dimensional standard (EN 10278); d) dimensions and tolerances on dimensions; 6

11 SS-EN :2008 (E) e) reference to this European Standard including the number of the part (e.g. EN ); f) steel name or steel number (see 4.2); g) delivery condition (see 6.3); h) class of surface quality (see 7.7 and Table 1); 5.2 Options The following options may be supplied by the purchaser and as agreed with the manufacturer: a) reference testing for products used in the quenched and tempered condition (see B.1); b) any fine grain requirement and verification of fine grain size (see 7.4 and B.2); c) any requirement for the verification of non-metallic inclusions (see 7.5 and B.3); d) depth of decarburization (see 7.6 and B.4); e) additional requirements to the tolerances on shape according to EN 10278; f) temporary corrosion protection (see B.5); g) non-destructive testing (see 7.8 and B.6); h) product analysis (see and B.7); i) special marking (see 9 and B.8); j) hardenability requirements for grades of EN and EN (see and 7.3 of EN and EN ); k) type of inspection document in accordance with EN (see 8.1). EXAMPLE 2 t round bars with nominal diameter 20 mm, tolerance h9, stock length 6000 mm according to EN made of steel grade 38SMn28 (1.0760) according to EN in the delivery condition +C, surface quality class 3 and a test report 2.2 as specified in EN t round bars EN h9 x stock 6000 EN SMn28+C - class 3 EN or 2t round bars EN h9 x stock 6000 EN C - class 3 EN Manufacturing process 6.1 Steel making process The steelmaking process shall be at the manufacturer s discretion. 7